Struct MemoryStore 

pub struct MemoryStore { /* private fields */ }

A store in memory, lost when the process ends. For tests, and for applications that persist the JSON themselves.

Implementations

impl MemoryStore

pub fn new() -> Self

An empty store.

pub fn saved(&self) -> Option<String>

The JSON saved last, if any.

Trait Implementations

impl Debug for MemoryStore

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for MemoryStore

fn default() -> MemoryStore

Returns the “default value” for a type.

impl Store for MemoryStore

fn save(&self, json: &str) -> Result<()>

Replaces what was saved with json. Returns only once the data would survive a crash: the purse hands out keys and transfers only after this succeeds.

fn lock(&self) -> Result<Option<Locked>>

Locks the store against other processes and reads what is saved in it, for a store more than one process writes. A purse calls it before every change: it makes the change to what was read here, saves, and only then drops the lock, so it never saves over a change another process made since it last looked.